Description: 1990’s Sport Rolexes are known for their ability to patinate. Lume plots tend to darken and saturate, aluminum bezels soften with time and this 16710 from 1991 is no exception. Rolex’s cal. 3175’s Quick-Set date allows for easy adjustments, and jumping local-hour hand helps track separate time zones. This GMT-Master’s case comes unpolished and comes with its original caseback sticker.